forked from Mirrors/opensbi
b2df751acf
PMP & performance counters belong to a hart rather than a platform. In addition to that, these features enable reading/writing from a particular csr. Thus, they can be detected and set at runtime rather than compile time. Move PMP/MCOUNTEREN/SCOUNTEREN features to hart and detect them at runtime. Signed-off-by: Atish Patra <atish.patra@wdc.com> Tested-by: Jonathan Balkind <jbalkind@cs.princeton.edu> Reviewed-by: Anup Patel <anup.patel@wdc.com>
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __SBI_HART_H__
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#define __SBI_HART_H__
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#include <sbi/sbi_types.h>
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/** Possible feature flags of a hart */
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enum sbi_hart_features {
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/** Hart has PMP support */
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SBI_HART_HAS_PMP = (1 << 0),
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/** Hart has S-mode counter enable */
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SBI_HART_HAS_SCOUNTEREN = (1 << 1),
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/** Hart has M-mode counter enable */
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SBI_HART_HAS_MCOUNTEREN = (1 << 2),
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};
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struct sbi_scratch;
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int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
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extern void (*sbi_hart_expected_trap)(void);
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static inline ulong sbi_hart_expected_trap_addr(void)
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{
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return (ulong)sbi_hart_expected_trap;
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}
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void sbi_hart_delegation_dump(struct sbi_scratch *scratch);
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void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
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int sbi_hart_pmp_check_addr(struct sbi_scratch *scratch, unsigned long daddr,
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unsigned long attr);
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bool sbi_hart_has_feature(u32 hartid, unsigned long feature);
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unsigned long sbi_hart_get_features(u32 hartid);
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void __attribute__((noreturn)) sbi_hart_hang(void);
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void __attribute__((noreturn))
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sbi_hart_switch_mode(unsigned long arg0, unsigned long arg1,
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unsigned long next_addr, unsigned long next_mode,
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bool next_virt);
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#endif
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